Yijie Qin developed server-side pagination for the Rule Groups API in the prometheus/prometheus repository, addressing scalability and performance challenges when retrieving large sets of rule groups. By introducing group_limit and next_token parameters to the list rules API, Yijie enabled efficient navigation and reduced server load during bulk queries. The work involved end-to-end API design, backend integration, and preparing the changes for a versioned release. Utilizing Go and leveraging skills in API and backend development, Yijie’s contribution improved user experience for large repositories and demonstrated a solid understanding of scalable API patterns within a widely used open-source monitoring system.